I just bought this and don't want to go to 4.2.1 if it doesnt have that already. Is it possible to install a custom firmware without updating the modem firmware? What program to use?
What I think he's saying is if it doesn't have 4.2 he would like to JB whatever earlier firmware he has without upgrading the baseband. Yes search my username I've put the link up for iClarified tutorials on different methods to JB earlier versions. I beleive you will have to use pwnage tool if you don't want to upgrade the baseband. If you're already on 4.2 then like everyone said you would need your shsh blobs to downgrade and it still wont downgrade your baseband. I'm a little rusty so if I'm wrong someone will correct me.